What is oil carry over?
There will always be a certain amount of oil carry over from a compressor. When the compressor it is running hot or is being over worked, oil carry over is made worst. The hot oil fumes and then condenses in the hose and in the tools. The affect can be reduced by running the compressor as cool as possible, making sure there are no leaks and that the outlet pressure regulator on the compressor is set as low as possible. Ensure there there is plenty of ventilation. You can place a cooling fan near the unit it in hot weather. A coalescing filter can also be used to reduce oil and condensate